Improvement in furnaces for treating iron ores



l. ROGERS.

Ore Furnace.

"Paterited Feb. 26, 1861.

f/TOR. 2

M mgowj UNITED STATES PATENT rEicE.

ISAAC ROGERS, OF HAVERSTRATV, NEWV'YOBK, ASSIGNOR TO SAMUEL DASKAM, OF NEV YORK CITY.

IMPROVEMENT IN FURNACES FOR TREATING IRON ORES.

Specification forming part of Letters Patent No. 3| ,580, dated February 26, 1861.

To all 1071,0712, it inag concern.-

Be it known that I, ISAAC ROGERS, of Havcrstraw, in the county of Rockland and State of New York, have invented, made, and applied to use a certain new and useful Improvement in Furnaces for Treating Iron Ores; and

I do hereby declare that the following is a full,

clear, and exact description of the nature of said invention, reference being had to the annexed drawings, making part of this specification, wherein Figure 1 is a vertical longitudinal section of my improved apparatus. Fig. 2 is a cross-section at the line 1 1, and Fig. 3 is a sectional plan showing the fines that communicate to the heating and deoxidizing chamber.

Similar marks of reference denote the same parts.

The nature of my said invention consists in a peculiar construction of apparatus for deoxidizing iron ores, by means of which the atmosphere is effectually excluded from the iron while being deoxidized, and a sufficient and regulated amount of heat applied to the deoxidizing apparatus for producing a combination of the iron with carbon introduced with the ore, while the oxygen is driven off and combines with the carbon. By this means I am enabled practically to manufacture an we cellent quality of wrought-iron direct from the ore. I

My present invention is an improvement upon that for which Letters Patent were granted to me August 21, 1860, and relates to the construction of the parts, whereby the atmosphere and the products of combustion from the furnace are so effectually excluded from the deoXidizing-cylinder that the operation is greatly facilitated.

In the drawings, a is the flre-chamber of a rcverberatory or otherlfurnace. b is thehearth upon which the iron is melted and puddled. 2 2 2 are the furnace-doors. S is the escapeflue to the chimney c, that is provided with the damper 4., as usual. 5 5 5 are columns supporting the chamber d, that is made of firebrick or other suitable material and surrounds the cylinder 6. This cylinder 6 is supported on journals 10 and 11, and revolved slowly by the chain-wheel f or other suitable means. The journal 11 is hollow, and through it a feeding-screw, 12, passes, that is driven by the wheel 13, and passes into said cylinder from the hopper g a mixture of iron ore and carbon in the proper proportions. The ore and carbon are passed from one end to the other by means of the screw-formed flange 16, and 17 is the outlet for the ore into the hopper i, from which the ore is delivered into the melting or puddling furnace b by drawing the slide 19.

The cylinder 0 and contents are heated by the flame and gases escaping from the furnace b, and for this purpose I provide the flues 7 7, leading into the chamber d; and h is a chimney built over the chamber (2, and provided with the damper 15. By the dampers 4 and 15 the heat of this chamber (1 and cylinder 6 can be regulated with great accuracy, and in order to observe the heat of said cylinder 6, (which should be a dull red,) I provide openings with covers at 9 9.

I find that the heat can be regulated much better by the chimney h, placed over the chamber cl, than when constructed separately, because the heat will pass off directly by opening the damper in case too much heat is imparted to the cylinder.

I find it preferable to revolve the cylinder 6 slowly and deliver a charge into the hopper '1? each revolution, of sufficient size to make a ball or bloom in the puddling-furnace; and I have found that when the opening 17 is not closed (as was the case in my former patent) the flame from the furnace and the gaseous products of combustion pass into the cylinder and the carbonaceous gases escape, thereby materially injuring the perfect operation of the revolving cylinder 6 in deoxidizing the metallic ores. I therefore provide the cylindrical shield Z, that proceeds from the upper edge of the hopper i, and encircles the delivery end of the cylinder 6, so that the opening 17 is effectually closed, except when directly over the hopper 6, and even in this position no airor gases can enter, because the slide 19 closes the hopper, and the divisions 8 extend to the lower side of the cylinder at the ends of the hopper.

By the plan, Fig. 3, it will be seen that the flues 7 7 pass by the hopper 'i before opening into the chamber (1, which renders it convenlent 0 apply the shield lfor'the aforesaid purpose.

A door or trap might be fitted to close up the opening 17,and be opened by a latch as it revolves for the discharge of the oresbut I prefer the shield set forth.

\Vhat I claim, and desire to secure by Letters Patent, is

1. The shield or cover Z, in combination with a revolving heated cylinder for deoxidizing metallic ores, whereby the atmosphere, flame, or heated gases are excluded from the deoXizing-cylinder, as set forth.

2. The arrangement of the chimney h over the end of the chamber d nearest the hopper g and most remote from the entrance of the flues 7 7 for regulating the heat of the chamber (Z and deoxidizing-cylinder c, as set forth.

In witness whereof I have hereunto set my signature this 21st day of J anuary 1861.

ISAAC ROGERS.

XVituesses:

LEMUEL XV. SERRELL, CHAS. H. SMITH. 

